Cardinal Tetra (Paracheirodon axelrodi) – The Iconic Amazonian Jewel

No aquarium is complete without the dazzling spectacle of a Cardinal Tetra school. Arguably the most iconic nano fish in the world, the Cardinal Tetra boasts an electric, neon blue stripe that runs head to tail, contrasted against a deep, vibrant red that covers the entire lower half of its body. Unlike its cousin, the Neon Tetra, this red stripe is complete and unbroken, creating a richer and more intense color display. When kept in a proper school, their synchronized movements and brilliant colors create a mesmerizing effect that brings any planted or biotope aquarium to life. Their peaceful nature and stunning looks make them an essential addition for beginners and advanced aquarists alike.

Key Features

• Brilliant, Unbroken Coloration: Features a vivid, full-body red stripe beneath an iridescent blue line, offering more intense color than the standard Neon Tetra.
• Iconic Schooling Fish: A quintessential community fish that must be kept in groups of 8-10 or more to feel secure and display its most vibrant colors and natural shoaling behavior.
• Peaceful Community Temperament: An ideal citizen for peaceful aquariums, they coexist beautifully with other small, non-aggressive species.
• Perfect for Planted & Biotope Tanks: Their colors stand out spectacularly against the lush green of aquatic plants or the dark tannins of a blackwater setup.
• Active & Engaging: A school of Cardinals adds constant, graceful motion to the middle levels of the aquarium, creating a dynamic and lively environment.

Care Requirements

• Tank Size: A 15-gallon tank is the minimum for a small school, but a 20-gallon “long” or larger is highly recommended to allow for more swimming space.
• Water Conditions: Prefers soft, acidic water (pH 5.0-7.0) and warmer temperatures, ideally between 75–82°F (24–28°C).
• Tank Setup: They thrive in planted aquariums with open swimming areas and some shaded regions created by driftwood or floating plants.
• Diet: Omnivorous. A high-quality micro-pellet or flake food should be the staple, supplemented with small live and frozen foods like daphnia, baby brine shrimp, and bloodworms to enhance their coloration.
• Tank Mates: Ideal companions include other peaceful tetras, rasboras, Corydoras catfish, dwarf cichlids (like Apistogramma and Rams), and Otocinclus.

Why Choose Our Cardinal Tetras?

The Cardinal Tetra is more than just a fish; it’s a living jewel that defines the classic freshwater aquarium. We pride ourselves on offering exceptionally healthy and vibrant specimens. Our Cardinals are carefully quarantined and conditioned, ensuring they arrive at your door active, colorful, and ready to become the heart and soul of your aquatic world.

Shipping & Live Arrival Guarantee

We ship healthy, vibrant Cardinal Tetras directly from our US-based facility. Every order is meticulously packed and is backed by our 100% Live Arrival Guarantee for a stress-free purchase.